---
product_id: 345064298
title: "SIMAX3D MGN12 Linear Rail Guide 300mm Linear Sliding Guideway with MGN12H Sliding Block for 3D Printer and CNC Machine (H-Type)"
brand: "simax3d"
price: "€ 77.92"
currency: EUR
in_stock: true
reviews_count: 5
url: https://www.desertcart.fr/products/345064298-simax3d-mgn12-linear-rail-guide-300mm-linear-sliding-guideway-mgn12h
store_origin: FR
region: France
---

# Compatible with M3 T nuts 300mm precision length Rubber stoppers for safety SIMAX3D MGN12 Linear Rail Guide 300mm Linear Sliding Guideway with MGN12H Sliding Block for 3D Printer and CNC Machine (H-Type)

**Brand:** simax3d
**Price:** € 77.92
**Availability:** ✅ In Stock

## Summary

> Elevate Your Build Game! 🚀

## Quick Answers

- **What is this?** SIMAX3D MGN12 Linear Rail Guide 300mm Linear Sliding Guideway with MGN12H Sliding Block for 3D Printer and CNC Machine (H-Type) by simax3d
- **How much does it cost?** € 77.92 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/345064298-simax3d-mgn12-linear-rail-guide-300mm-linear-sliding-guideway-mgn12h)

## Best For

- simax3d enthusiasts

## Why This Product

- Trusted simax3d brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Safety First:** Equipped with rubber stoppers to prevent accidental dislodging.
- • **Robust Design:** Stainless steel construction ensures durability and longevity.
- • **Easy Installation:** Designed for seamless integration with 20 series EU Al-profile.
- • **Precision Engineering:** Crafted for accuracy in 3D printing and CNC applications.
- • **Lightweight Performance:** Weighs only 295g, making it easy to handle and install.

## Overview

The SIMAX3DMGN12 Linear Rail Guide is a 300mm precision sliding guideway designed for 3D printers and CNC machines. It features a robust stainless steel construction, easy installation with M3 T nuts, and safety rubber stoppers to ensure smooth and secure operation.

## Description

MGN12 Linear Rail Guide 300mm Linear Sliding Guideway with MGN12H Sliding Block for 3D Printer and CNC Machine (H-Type)

## Features

- Packing List: 300mm MGN12 Linear Rail*1, MGN12H Sliding Block*1
- Notification: There's size note in picture, make sure you get the correct size.
- Recommendation: Please use M3 T nut and screw to fix the linear rail for 20 series EU Al-profile.
- Good Details: There are two rubber stoppers on each side of the linear rail to prevent the sliding block from falling out.
- MGN12H Linear Slide 300MM Note: Please use M3 T nut and screw to fix the linear rail for 20 series EU Al-profile.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | SIMAX3D |
| Part number | MX-MGN12H300 |
| Item Weight | 295 g |
| Package Dimensions | 40.64 x 5.08 x 5.08 cm; 295 g |
| Item model number | c |
| Size | 300MM |
| Color | Rail*1+Block*1 |
| Style | Sliders*1PCS |
| Material | Stainless Steel |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** SIMAX3D
- **Material:** Stainless Steel
- **Bearing Number:** MGN12001
- **Bearing Type:** Linear Bearing
- **Compatible Lubricant:** Grease

## Images

![SIMAX3D MGN12 Linear Rail Guide 300mm Linear Sliding Guideway with MGN12H Sliding Block for 3D Printer and CNC Machine (H-Type) - Image 1](https://m.media-amazon.com/images/I/41D4XlgXgyL.jpg)

## Available Options

This product comes in different **Color, Size, Number of Items** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Good quality
  

*by V***R on Reviewed in the United States on 25 June 2023*

I'm a CNC machinist and know good and bad quality rails and these are probably 8 out of 10 quality. Put them on my ender 3v2 for Y Axis and printed rail attachments to fit them to it.

### ⭐⭐⭐⭐⭐ 







  
  
    Solid cheap rails
  

*by T***R on Reviewed in the United States on 12 February 2022*

Solid rails for my ender 3 so far. Got 2 more for the y axis, working great.

### ⭐ 







  
  
    Does not slide smooth at ALL!!!
  

*by J***  on Reviewed in the United States on 29 August 2023*

Even after multiple attempts of disassembling,cleaning, relubing, it just does not slide smooth, I can feel the ball bearings catching every quarter of a inch which leads me to believe that the ball bearings are out of spec and not round at all. I’ve bout several from another vendor and they are like butter!! Unfortunately I can not recommend these rails to anyone!

## Frequently Bought Together

- MGN12 Linear Rail Guide 300mm Linear Sliding Guideway with MGN12H Sliding Block for 3D Printer and CNC Machine (H-Type)
- Key-Bak Super48 HD 8oz. Locking Retractable Key Holder, 48" Retractable Cord, Black Polycarbonate Case, Steel Belt Clip, Oversized Split Ring

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**Shop now:** [https://www.desertcart.fr/products/345064298-simax3d-mgn12-linear-rail-guide-300mm-linear-sliding-guideway-mgn12h](https://www.desertcart.fr/products/345064298-simax3d-mgn12-linear-rail-guide-300mm-linear-sliding-guideway-mgn12h)

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*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-01-23*